Question 362031
[A]={{{(matrix(3,3,2,4,2,5,-2,6,3,3,-4))}}}
[x]={{{(matrix(3,1,x,y,z))}}}
[b]={{{(matrix(3,1,12,7,5))}}}
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det[A]={{{174}}}
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[A]inv={{{(1/174)*(matrix(3,3,-10,22,28,38,-14,-2,21,6,-24))}}}
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[x]={{{(matrix(3,1,1,2,1))}}}